Sounds are made when objects vibrate. The vibrations enter your ear and you hear them as sound. Find out more about how sound travels.
Sound waves make the eardrum vibrate and then send messages to the brain. Find out more about how the ear detects sounds.
A drum with a tight skin makes a high pitched wave. Find out more about sound waves and pitch.
Light comes from different sources, like lamps, bulbs and the sun. Find out more about how light travels.
When light hits an object it is reflected (bounces back) and enters our eyes. Find out about different reflective surfaces and how we see things.
Light bounces off some surfaces. But light travels right into your eye. Explore how your eye detects light.